Always call update_use_power() instead of directly setting the use_power var.

- This will let us react to the change appropriately.
- While we're here, lets define some constants so we can stop using bare numbers.
- Always use those constants when calling update_use_power()

code/modules/admin/verbs/debug.dm

@@ -539,7 +539,7 @@
 					Pump.air2.gas["nitrogen"] = 3750	//The contents of 2 canisters.
 					Pump.air2.temperature = 50
 					Pump.air2.update_values()
-				Pump.use_power=1
+				Pump.update_use_power(USE_POWER_IDLE)
 				Pump.target_pressure = 4500
 				Pump.update_icon()